THE IMPACT OF MINING EXCAVATIONS (VOIDS) ON THE WATER QUALITY MANAGEMENT IN THE NORTH KALIMANTAN PROVINCE von Ardian, Sandy, Aipassa, Marlon Ivanhoe, Oktaviani, Reva, Imang, Ndan, Devy, Shalaho Dina, Susilo, Heru Ivanhoe, Kristiningrum, Rochadi Kristiningrum, Sarwono, Edy Kristiningrum, Arifin, Dawamul Ivanhoe

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